<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script src="http://cdn.bootcss.com/jquery/3.1.0/jquery.js"></script>
    <style>
        .hi{
             border: 1px solid green;   
        }
        .bg{
             background-color: yellow;
        }
    </style>
</head>
<body>
    <div>
        <li>ab</li>
        <li>ab</li>
        <li>ab</li>
    </div>
   
    <ul class="an">
       <li class="item1">abc1</li>
       <li class="item2">abc2</li>
       <li class="item3">abc3</li> 
    </ul>
    <form action="tt.do" name="he"><input type="text" name="a1"><input type="text" name="a2">
        <input type="submit">
    </form>
    <button>test</button>
    
   <h>abc</h>
   <script>
    $(function(){
       $("button").on("click",function(){
           $.ajax({
                url:"ll",
                jsonp:function(data){
                	alert(data);
                },
                data:{uname:"john"},
                success:function(d){
                    alert(d);
                }
            });   
            
       });
        
    });
    </script>
</body>
</html>